b, 2034-(34+1560);1972-(368+972)=(2034-34)-(1560)=2000-1560=440
1972-(368+972)=1972-972-368=1000-368=632
2034-(34+1560)
=2034-34-1560
=2000-1560
440
1972-(368+972)
=1972-972-368
1000-368
=632
k cho mình nha
b . 2034 - ( 34 + 1560 )
= 2034 - 34 - 1560
= 2000 - 1560
= 440
1972 - ( 368 + 972 )
= 1972 - 368 - 972
= ( 1972 - 972 ) - 368
= 1000 - 368
= 632